Apparatus for compressing carbon-black and other pulverulent materials



v w. w. McMAHAN. APPARATUS PUB GOMPRESSJNG CARBON BLACK AND OTHER PULVERULENT MATERIALS.

APPLICATION FILED JUNE18, 1919.

Patented Mar. 22, 1921.

A TWP? N 9 Quito/cum A This UNITED STATES PATENT OFFICE.

WILLIAM W. MCMAHAN, OF DETROIT, MICHIGAN, ASSIGNOR TO MORGAN & WRIGHT,

A CORPORATION OF MICHIGAN.

APPARATUS son COMPRESSING cAnBon-BLAcii AND OTHER PULVERULENT MATERIALS.

Application filed June 18,

To all viwm it may concern:

siding at Detroit, county of .Wayne, and a State of Michi 'an, have invented certain pew and useful improvements in Apparatus or Pulverulent Materials, of whichthe following is a full, clear, and exact description.

This invention relates to apparatus for compressing pulverulent material and espe cially flocculent materials such: as carbon black, and it has for its object the provision of means for changing the physical state of the said carbon black or similar material from a loose powder, comprising particles isolated from each other by air, to a solid cake in which the particles are firmly held to ether bymolecular cohesion.

erctofore it has been found difiicult to compress carbon black into permanent cake form. I have discovered that this difiiculty maybe overcome by so designing the compressing apparatus as to permit the air contained within the mass of the powder to escape freely during the compressing operation.

This case is a continuation in. part of my application Serial No. 129,290, filed Novemher 3, 1916. a

The invention will be understood by refer ence to the accompanying drawing which illustrates an embodiment of the invention designed to compress the powder into a cylindrical solid cake.

The figure of the drawing is a longitudinal sectional view of the said apparatus.

The embodiment of the apparatus illustrated in the drawing consists of a base A, formed with a central aperture 1 enlarged toward its lower end to form a fluid chamher 2. Within the aperture 1 oft-he base member A and projecting within chamber 2 is a ram 3, The base member A at its upper end is provided with the flange or flanges 4, formed with apertures 5 to receive the reduced lower ends of stud bolts 6, the reduced upper ends 6 of said bolts being fitted within apertures 7 in the lower flange pf a press head B, the latter having formed therein a compression chamber 8 in register with the ram 3. The base and head Specification of Letters Patent.

I ber 10, the latter being Compressing Carbon-Black and other the pulverulent material thus being pressed within the compression chamber Patented Mar. 22, 1921. 1919. Serial No. 305,156.

members of the press are held together in fixed-relationship by means of the studs 6 and nuts 9 on the threaded ends of the studs.

The compression chamber 8 may be opened and closed by means of a cap mempivotally mounted at 11 upon a bracket extension 12 of the press head B, the cap being held in closed position by means of a latch member 13.

A duct is formed in the wall of chamber 2, and a pipe 14 is threaded within said duct so that fluid under pressure may be forced into chamber 2 to operate the ram 3, and a suitable exhaust duct 14* may be provided for the said chamber. A packing 15 may be disposed intermediate the ram and the base member A, and means such as ring 16 and screws 17 may be provided for compressing the packing about the ram.

The cap member 10 of the press is formed with one or a series of apertures 18 for a purpose to be described.

In operation, the carbon black or other pulverulent material will be placed within the compression chamber 8; and a screen 19 is preferably employed intermediate the said material and the cap member 10. The cap member is then locked in position and pressure is applied to the lower end of the ram,

com-

into the form of a solid cake. During the upward movement of the 'ram the air is forced from between the particles of the material and is dispersed into the atmosphere through the screen and vents 18.

It will be understood that the vent opening or openings may be formed either in the cap member 10 or at other points of the compressionchamber; suchas through the side wall of the latter; and the screen may he -formed of porous paper, cloth, metal or other suitable material. When the compressing operation has been completed the compression chamber may be opened and a further upward movement of the ram may be employed to force the cake of powder out of the chamber.

If desired, the carbon black or other ma; terialmay be inclosed in an envelop such as a paper or cloth bag at the time it is placed in thecompression chamber. In such case the bag may serve as a screen to prevent the forcing out of the powder through the rent openings.

Having thus described my invention. What I claim and desire to protect by Letters Patent is:

1. In apparatus of the character described, a compression chamber, a ram disposed within the compression chamber. a closure for the compression chamber at that end of the latter opposite the ram. said closure comprising a hinged cap and locking; means for the cap, and means for imparting a compression stroke to the ram in the direction of the said cap.

2. In apparatus of the character. described. a compression chamber, a ram disposed Within the compression chamber and means for imparting an endwise movement thereto. a closure for the compression chamber at that end of the latter opposite the ram.- said closure comprising a hinged cap and locking means for the cap, the said cap being formed with a vent opening for the passage ol air from the chamber to the atmosphere.

3. In a compression apparatus. the combination of a compression lit1111b(1.:\ h draulic ram disposed therein. a closure for the chamber and locking means there for. air rents in the closure, screens intermediate the vents and chamber. and fluid m ans tor actuating the ram.

4-. In apparatus of the character described. a base member formed with a tluid chamber. a ram supported in said base memher and in register with the tiuid chamber. a press head rigid]; secured to the base member above the latter and formed with a compression chamber in register with the upper end of said ram. the ram tor-mine a bottom wall or the compression chamber. a hinged cap for the compression chamber. and locking means for the 'ap.

Signed at Detroit. iilicliigan. this 1 1th day of June, 1919.

WILLIAM W. Meal an). N. 

